Crear actividad
Jugar Test
1. 
The checkout operator scans the item.
2. 
The scanner reads the barcode.
3. 
The scanner converts the barcode into electrical pulses.
4. 
The scanner sends the pulses to the branch computer.
5. 
The branch computer records the sale of the product.
6. 
The till shows the item and price.
7. 
The till prints the item and price on the paper receipt.